Acne is related to excessive sebum secretion, consumption of spicy and irritating foods, or frequent staying up late. Generally, it is a disease caused by Propionibacterium acnes infection. Commonly used toothpaste applied externally is ineffective as it cannot remove the Propionibacterium acnes on the acne surface. Once identified, it is still necessary to seek formal treatment at the dermatology department of regular hospitals. Oral medications combined with external use and phototherapy treatments such as red and blue light can improve the condition more quickly. After recovery, it is crucial to avoid spicy and irritating foods long-term, try not to stay up late, avoid anxiety and stress, and refrain from improperly using cosmetics that can clog pores. Regularizing diet, lifestyle habits, and enhancing exercise can help prevent recurrence significantly.